When I use the manual focus mode, I usually adjust it until the object I care about comes into focus. But sometimes the object is not there yet, so I'd like to know if there is a way for me to tell ...

I've been using the Logitech C615 web cam for some time now, for timelapse photography. However I'm not perfectly happy with its focus at "infinity". It's not perfectly clear. On closer distances the ...

In an answer to question "What lens characteristics are important in astrophotography?" there was mentioned "If the temperature changes drastically, you may need to refocus as different materials in ...

On the kit 18-55 lens that came with my Nikon D5100 I have noticed that when trying to focus on infinity for shots in dark conditions (star-trails, etc) the lense tends to move past infinity out of ...

All my lens have focus ring where at the end there's an infinity symbol. What does that mean? If I'm taking landscape shot and what everything from near to far to be in focus, do I use infinity? Or am ...

How can I determine the diameter of the image circle (i.e. the diagonal size of CCD required to fully utilise a telescope's optics) at near-infinity focus? I have looked around online and found this ...

I have a Nikon P310 point and shoot which I intend to use for a very specific application. I want to use infinity focus setting. However, when selecting infinity focus the camera disables the flash. ...

I have a kit lens which has no markers. What would be a recommended way to find infinity focus on this lens?
I plan to shoot objects at night -- not necessarily stars or the moon. So, adjusting the ...